The Timex Deepwater Arctic 200 TW3A01900 and Seiko 5 Sports SRPD51 suit different priorities. Timex says its quartz watch is suitable for recreational scuba diving and rates it to 200 m; Seiko’s 10-bar SRPD51 is an automatic day-date watch for everyday wear and swimming, but Seiko says it is not for scuba diving. The SRPD51 is wider and thicker on paper, while the Timex has a sapphire crystal and ceramic bezel inlay. These are manufacturer specifications, not results from hands-on testing.
At a glance: two different kinds of everyday watch
“Seiko 5 Sports” covers multiple models, so this comparison uses the specific SRPD51. Its specifications should not be generalized to the whole collection. The Timex is the Deepwater Arctic 200 reference TW3A01900.
As an Amazon Associate I earn from qualifying purchases.
| Specification | Timex Deepwater Arctic 200 TW3A01900 | Seiko 5 Sports SRPD51 |
|---|---|---|
| Movement | Quartz analog; battery type SR626SW listed by Timex | Automatic with manual winding, caliber 4R36; approximately 41-hour power reserve |
| Case dimensions | 40.5 mm diameter; 47 mm lug-to-lug; 11.5 mm thick | 42.5 mm diameter; 46.0 mm lug-to-lug; 13.4 mm thick |
| Crystal | Sapphire | Hardlex |
| Water use stated by manufacturer | 200 m; Timex says suitable for recreational scuba diving | 10 bar; Seiko says 10-bar watches are not suitable for scuba diving |
| Bezel | Unidirectional rotating bezel with ceramic inlay | Unidirectional rotating bezel |
| Luminous material | Super-LumiNova on hands and indices | LumiBrite on hands and indices |
| Other listed features | Screw-down crown; screw-on case back | Day/date; see-through and screw case back; stainless steel bracelet on the cited US page |
Figures and features are from the Timex TW3A01900 product page and Seiko’s US SRPD51 page. Listed measurements describe the cases, not how either watch will feel on a particular wrist.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Can you scuba dive with either watch?
Timex Deepwater Arctic 200
Timex rates the TW3A01900 to 200 m and explicitly describes it as suitable for swimming, snorkelling, surfing and recreational scuba diving. That is the manufacturer’s stated use for this reference; it is not evidence here of an ISO 6425 certification or independent pressure testing.
#1 Best Overall
- 40mm silver-tone case
- 8 inch blue strap
- Blue dial
- Sapphire lens
- Water resistant up to 200 meters
Seiko 5 Sports SRPD51
Seiko lists the SRPD51 at 10 bar. Seiko’s guidance for 10-bar watches says they are suitable for bathing or shallow diving, but not scuba diving, and recommends a Seiko Diver’s watch for scuba. A pressure or depth rating alone should not be treated as proof of formal dive-watch certification. See Seiko’s water-resistance guidance.
If scuba diving is part of the plan, the manufacturer’s stated guidance gives the Timex the clearer fit of these two. Follow the exact watch’s instructions and account for its condition and service history; no independent water-pressure test is available for this comparison.
Rank #2
- 40mm silver-tone case
- 8 inch two-tone bracelet
- Black dial
- Sapphire lens
- Water resistant up to 200 meters
Quartz Timex or automatic Seiko?
Timex: quartz simplicity
The Arctic 200 uses quartz analog movement and a replaceable SR626SW battery. It does not require winding to keep running, but the battery will eventually need replacement. The cited Timex page does not list a date function for TW3A01900, so do not assume it has one based on another Deepwater variant.
Free tools Windows power users keep installed
One-click scans. No signup required.
Seiko: automatic movement with day and date
The SRPD51’s caliber 4R36 is automatic and can also be wound manually. Seiko lists an approximate 41-hour power reserve and a day/date display. It offers the mechanical movement experience, but the listed reserve is not an accuracy comparison or a prediction of service costs.
Rank #3
- 40mm silver-tone case
- 8 inch silver-tone bracelet
- Blue dial
- Sapphire lens
- Water resistant up to 200 meters
Which is likely to wear smaller?
The Timex has the smaller diameter and is thinner: 40.5 mm across and 11.5 mm thick, compared with the Seiko’s 42.5 mm and 13.4 mm. The Seiko’s lug-to-lug length is slightly shorter, at 46.0 mm versus 47 mm for the Timex. Those measurements point in different directions: the Timex is narrower and slimmer, while the Seiko spans a little less from lug to lug. Wrist shape, strap or bracelet fit, and personal preference determine comfort; dimensions alone cannot settle it.
Crystal, bezel and everyday features
Timex lists a sapphire crystal and ceramic bezel inlay; Seiko lists Hardlex crystal. Both have unidirectional rotating bezels, and both list luminous material on the hands and indices. These material and feature listings do not establish comparative scratch resistance, bezel feel, or lume duration.
Rank #4
- 40mm silver-tone case
- 8 inch silver-tone bracelet
- Black dial
- Sapphire lens
- Water resistant up to 200 meters
The Seiko adds a day/date display and, on the cited US model page, a stainless steel bracelet. The Timex reference is listed with a synthetic rubber strap and a screw-down crown. Check the exact reference and market when comparing variants: Timex also lists TW3A02000 with the same core case dimensions, sapphire crystal, ceramic bezel and 200 m rating, but it is a separate visual variant.
Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minutePC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Which one should you choose?
- Choose the Timex Deepwater Arctic 200 if you want quartz operation, a slimmer and narrower case on paper, sapphire crystal, or a watch whose manufacturer explicitly states suitability for recreational scuba diving.
- Choose the Seiko 5 Sports SRPD51 if you prefer an automatic movement, want a day/date display, and need a watch for daily wear and swimming rather than scuba diving.
- Try both on if fit is the deciding factor. Their diameter, thickness and lug-to-lug measurements do not predict comfort for every wrist.
Manufacturer-page prices are dynamic and are not a matched street-price comparison. Check each product page for the current price and availability in your market before buying.
Quick Recap
Best Value
- Forged For The Deep - Built to dive, with 200m water resistance reinforced by a screw-down crown and screw-on case back, a unidirectional ratcheting top ring for tracking time spent underwater, and a sturdy crown protector.
- Stainless-steel Case - The durable stainless-steel case is resistant to corrosion, rust, and daily wear and tear.
- Enhanced Visibility - Super-Luminova in-fill on the hands and hour markers ensures readability in low-light conditions, while an anti-reflective sapphire crystal provides a clear view of the wave-patterned dial.
- UV-Resistant Rubber Strap - The HNBR rubber strap is flexible for comfort in and out of the water. Plus, it's equipped with quick-release spring bars for effortless changes without the need for tools.
- Quartz Movement - Powered by a battery, this watch ensures every second is counted with precision down to the milliseconds.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
